| Rank | Abbreviation | Meaning |
|---|
| ***** | CSSI | Calculus Surface Severity Index system
| |
| *** | CSSI | Computer Security Subsystem Interpretation
| |
| *** | CSSI | CUSTOMER SERVICE SKILLS INVENTORY
| |
| *** | CSSI | Consolidated Supply & Services International Ltd
| |
| ** | CSSI | Coriolis Sickness Susceptibility Index
| |
| ** | CSSI | Custom Software Solutions Inc
| |
| ** | CSSI | Construction Safety Services Inc
| |
| ** | CSSI | commercial scaffolding sales inc
| |
| ** | CSSI | Console Sub System Interface
| |
| ** | CSSI | Central Security Services Inc
| |
| ** | CSSI | Center for Space Standards Innovation
| |
| ** | CSSI | Cognitive Science Society of Ireland
| |
| ** | CSSI | Centre for Smart Systems and Innovation
| |
| ** | CSSI | Compass Systems Sales Inc
| |
| * | CSSI | Computer Support Services, Inc.
| |
| * | CSSI | Civil Society Support Initiative
| |
| * | CSSI | Curvature Scale Space Image
| |
| * | CSSI | Creative Staging Services Inc
| |
| * | CSSI | Corporate Staffing Solutions Inc
| |
| * | CSSI | Critical Systems Services Inc
| |
| * | CSSI | Construction Specialty Services Inc
| |
| * | CSSI | Circuit and System Solutions
| |
| * | CSSI | Containment Spray System, Post-Accident Injection Phase
| |
| * | CSSI | Corporate Support Systems Inc
| |
| * | CSSI | CLEARING AND SETTLEMENT STANDING INSTRUCTIONS
| |